化工学报2025，Vol.76Issue(z1)：43-53,11.DOI:10.11949/0438-1157.20241362
采用低GWP制冷剂的级联加热自复叠高温热泵循环热力学分析
Thermodynamic analysis of auto-cascade high-temperature heat pump cycle using low GWP refrigerant
摘要
Abstract
Addressing the issue of low energy efficiency in high-temperature heat pumps under large temperature difference heating conditions,a novel auto-cascade high-temperature heat pump cycle is proposed.The cycle employs a cascade heating strategy to achieve high-temperature water heating.The zeotropic mixed refrigerant with low GWP is selected due to temperature glide characteristics.The HCs refrigerant is chosen for the low-boiling composition.A thermodynamic mathematical model is constructed to analyze the energy and exergy performance of the modified cycle.The result indicates that within the range of outlet water temperature variation,the heating COP and heating capacity increase by an average of 49.36%and 44.30%.The mass flow rate of the refrigerant is reduced by an average of 50.53%.The exergy efficiency is enhanced by 3.47 times.Therefore,the modified cycle demonstrates potential for improvement in both energy and exergy performance.关键词
自复叠热泵循环/非共沸混合制冷剂/能量分析/㶲分析Key words
auto-cascade heat pump cycle/zeotropic mixed refrigerant/energy analysis/exergy analysis分类
通用工业技术引用本文复制引用
杨语晴,李银龙,晏刚..采用低GWP制冷剂的级联加热自复叠高温热泵循环热力学分析[J].化工学报,2025,76(z1):43-53,11.基金项目
国家自然科学基金项目(52076160) （52076160）
